Side Space

Side Space moves your tabs out of the horizontal strip and into a full-height panel on the side of the screen. You can read complete page titles, pick tabs by clicking, and group related ones together. If you've used Arc or Edge's vertical tabs, this is the same convenience, available as an extension in any Chromium browser. That's the whole pitch.

One click sorts your open tabs into groups, either by domain or by categories you define yourself. The Group Guard feature watches for patterns and can auto-detect and group tabs as they come in. It's the fastest way to tame a window that's grown past the point of manual sorting.

Chat mode gives the AI copilot context about the page you're on, so you can ask about the content without leaving the tab. No copy-paste. On paid plans you can chat across multiple tabs at once, which is handy when you're comparing a few sources side by side.

Agent mode turns the copilot into something that takes actions rather than just answering. It handles browser chores like grouping tabs, managing windows, searching your history, and researching topics. Pro runs a page-level agent. Pro+ adds cross-page automation for longer workflows.

Spaces save automatically and sync across devices and browsers once you sign in. The company lists support for Chrome, Edge, Brave, Vivaldi, Sigma, Comet, Firefox, and Zen. A space you build on your laptop shows up on your desktop.

Beyond grouping, Side Space handles the grunt work: pin key tabs like a speed dial, find anything with fuzzy search, suspend tabs to free up memory, and strip out duplicates automatically. You can also copy all URLs in a space as markdown, text, or JSON, which is useful when you're handing a research set to someone else.

You can customize each space's color palette so different projects look different at a glance, and switch to dark mode for night browsing. It's a small touch. But it makes the panel easier to navigate when you're running several spaces at once.